In order to begin the Main Dragonborn Storyline, players must have completed Skyrim's main storyline up to The Horn of Jurgen Windcaller. Players can either wait until they are accosted by two cultists in Skyrim that will ask if you are the Dragonborn, whereupon defeating them will yield a clue as to their motives - or players can simply head to Windhelm and take a boat to the island of Solstheim. For either method, encountering the cultists will begin the Dragonborn Main Quest Line.